1.) what job group(occupation) was the smallest among immigrants? why do you think so few people from that group came to the united states?

2.) what job group was the largest? why do you think so many people from that group came to the united states?

Answer-

1- professionals.  This is because they had a high wage where they worked, as they were professionals, so they had no need to move countries to make a better life and make more money.  

2- laborers.  This is because they have bad jobs, with very little pay, and they would move countries, so they could possibly find a job with better pay, in a thriving economy such as the United States.  

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering